Island



Nb. 878,818. PATBNT'BD JAN.1 4, 1908.

s. R. BLANCHARD.

PUMP. APPLIOATON FILED DBO. 11I 1906.

' 2 BEEBTS-BHEET 1.

rn: Nunn: rzrsls eo., wAsNlnnmN, n. c.

No. 876,618.- PATENTED JAN. 14, 1908.

' s'. R. BLANCHARD.

PUMP. ABPLIGATION FILED DBO. 1v1. 190s.

2 SHEETS-SHEET 2.

nu: Nonni: Pzrtxs cal. uusiuucruu, n. c.

UNITED STATES PATENT OFFICE.

SFDNEY R. BLANCHARD, 0F O'ITAWA, ILLINOIS, .A'lSSIGNOR 'lO 'llil' O'ITAWA BANKING & TRUST QOMPAN'!" ui? QT'PAWA, ILLINOIS, .t CORPORATION 0F ILLINOIS.

PUMP.

Specification of Letters Patent.

Patented Tim` 14, 1908.

Application tiled December 1L 1906. Serial No. 347.339.

To all 'whom o :may concern:

Be it known that I, SIDN-Er R. BLANCHARD, a citizen of the United States, and a resident of Ottawa, in the county of Lasa-lle and State of Illinois, have invented certain new and useful Improvements in Pumps; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drewings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to im rovcinents in pumps and refers more speci icnlly telt-hut class of pumps provided with an auxiliary c. linder secured to and movable with the single acting lift piston of the pumpend operating in connection with a. fixed pist-on to produce a. flow of lit uid during the downstroke of the pump piston and thereby increase the cepa-city of the pump.

Among the objects of my invention is to improve the construction and ope-ration of pumps of this ty e and to provide a construction wherein tie pumping mechanism may be lifted from the pump cylinder without removing the. cylinder. Said improve-- ments are herein shown :is applied to u pum designed more specifically for dee-p wel )umping such, for inst-ance, as pumping oil om oil wells, and the improvements are capable of demonstrating their more superior advantages in this capacity.

In the drawingsz-Figure 1 is an axial sec-- tion of the pump cylinder and its extension, showing in elevation the pumping merlinnis'm. Fig. .2 is n view partly in side cle-vntion and partly in section of the puiiippisti'iii, the plunger-borrel and the slotted tube connecting the sai-nie.. F ig. 3 is su axial section..

of the connection or coupling for connecting the cylinder with the extension. Fig. 4 is n. crosssection, tiikoii on line 4*4 ol Fig. 3. Fig. 5 is mi axial section of the stationary piston, its rodend lioldcnsliowini.' nlso ii. poi'- tion of the .slotted tuho extending` through sti-id holder. Fig. (i is n. side t-lcviilion ol' tho st-utioniinv pistou holder und ports iuiun'diutely ussovutcd lliirowilli. Fig. 7 is ucross-section, hilton on linc- 7--T o' Fig. ."i. Figo, H und E) uro cross-sections. hilton on Iiinis HHM-8 und !l-----ll, respectively'. ol' Fig. i.

As shown in tho driiwiligs. I() designates tho cylinder or luirrol ol' u pump` und l l tho usilul reciprocating piston therein, roiiuoolvd with the lower end of a pump-rod 12 which is designed'for connection at its upper end with the pump actua-ting mechanism. Said piston is made hollow sind is provided with a, sent 13 through which communication is had 60 from one side to the other of the piston. The assage in the piston is closed by e suitable orm of valve 14 herein shown as consisting of a bell-valve, which is inclosed in 'a cage 15 carried by the piston. The rod 12 is herein 65 shown as connected with seid cage..

16 designa-tes n c vlintlric extension of the cylinder 10, itbeingof slightly greater diameter than said cylinder 10. The cylinder and extension are connected by ineens of ai tubu- 7o lar connect-ing piece 17 of special forni which is joined to the cylinder und extension by screw-threaded fittings 1S and 19 respectively. The said coupling 17 is provided, radially outside of its bore, with passages 20 75 which aliord communication between the cylinder 10 and extension 16 when the centml passavfe of said connection is closed, as will more iiilly appear hereinafter. The connect-ion is provided at one side with a thickcned wall 21 having a port 22 through which communication is aii'orded between the outer and inner side of the cylinder, said portl opening into an annular groove 23 formed in the inner wall of the iitt-in 24 designates, as a w iole, .fihollowexpunsible sent within seid connection, composed of a plurality of segments 25 that are hinged at their lower ends iii the upper end of the fitting 19 and are designed by s ring pressure to 90 rest against euch other to 'orin an upwardly fac-ing supi'iortiiig sont, but.. are capable of beingspread iipiu't. to enlarge the opening therein to permit. pui-ts to pti-ss tlioretlirougli ns will hereinafter appear. 'llie hinge coi'iiieotioiis 95 for sind segments ooiiiprisc lugs 2li thereon entering suitiihle recesses in the fitting lll and hinged thereto hy nieunsof pins 27. Spi-inps 2S nl tuohod to tho outer focos of tho segments und houi'iugniriiinst thorr'lndric. iiiiiorwullof 100 tho coiipliupy hold tho segments iioriuulb' inwardly lowiird oooh other.

3() dosignutos t ho hollow stuud-vulve, oi' ordinuijf typo. loomed n ttlio lower ond of tho cxli-usiou cylinder lli iii ii. llliupY I-l .siiid volvo voiiiprishipr thv usuul rinsing tlint hits .st-.rowlhi'onilid viigriigvnu'nl willi suid filling: und ii liull-olosuri.- Ii. controllingr the opening in suid rinsing.

.m designados u slotted iulii ulliiulnd iii its Ilo BLU upper end to the pist-on 11 and extcndin downwardly therefrom and rigidly connecter to and communicating with a plun er-barrel 34 that is movable up and down in t e extena 16 in unison wit said piston 11.

35 designates a stationary piston within the plu er barrel 34. lt is mounted on the lower en of a hollow stationary piston-rod 36 that is fixed relatively to the cylinder extension 16. As herein shown, said stationary piston 35 is carried bf' what is herein after termed a piston-ho der 38 that fits closely within the central bore of the connection 21 and is detachably locked therein. The said piston-holder fits closely within said connection so as to separate the c ylinder from the cylinder extension through t e cen- ,tral bore of said connection Suitable packi 0' 39 surrounds said stationary piston hnrilder above and below the annular recess 23 in the connection 21. The holder 38 is formed with acentral passage 40 that. oommunicates with and is disposed. in axial extension of the bore of the hollow, stationary piston-rod 36. The said holderis shown as made of cast-metal and the hollow stationary piston-rod is attached thereto by a coupling 41. The up er end of the central passage 40 of said holder communicates with one or more laterally directed ports 42 located between the packing rings 39, 39, and said ports dischar e into the annular recess 23 through whicl they communicate with the port 22. The slotted tube 33 is encircled by the pist-on holder 38, through which latter said tube Works freely up and down Without packing. The slot in said tube is made of a width to pass over the solid part of the holder in which is formed the port 42, whereby said tube may work freely within the hollow holder, while at the same time inclosing said stationary piston rod and permitting communication between said hollow piston rod and the port 22 of the connection 17. The said piston holder rests at its lower end on the upper end of the expansible seat 24, Thus the expansible seat predetermines the lowermost position of the holder and the sta.- tionary piston carried thereby. Seid stationary pist-on holder and the parts carried thereby are held from risimr by menus of n swinging, sprinr -pressed limiting pawl 44 that is pivoter to thel stationary piston holder and is adapted, under the inlluenrr ol' a s )rin 45, to s )ring out into rngngenu-.nt wit a t ownward y facing shoulder 46 in the connect-ion when the holder is lowered iu place.

ln order to insert the slolled luhe 33 through the stntioxuuy iiston holder, und nt the sri-nac time insert t ie stationner piston und its rod in thc plunger hnrrel 34 und the slotted tuhe 33, the stationary holder is disconnected from the pistou rodll nl Ilu` roupling 4l und the slotted lulu` is disronnrrlod at its upper end from the piston ll, and at its lower end is disronneoted from the plunger barrel 34. The stationary piston holder is then inserted over the upper end of the slotted tube and down in tlm lower enti lZ-hel'eof, the locking pawl passing through the slot of said tube, which slot opens to the extreme u per end of the tube. The piston holder is hereafter attached to the. station ary piston rod 36 at the coupling 41, the stationary piston and its rod is inserted into the plunger barrel and the slotted tube is connected with the lunger barrel 34 at its lower end and with tlie piston 1l at its upper end. The said mechanism is now readyY to he inserted in plat-e in the cylinder and cylinder extension.

ln installing'` the. pump the lower end of the extension 16 is connected by means of the coupling shown at said lower end with the usual perforated tuhe or screen and such an ehor tubing as may be desired. Sui'l'ieient tubing;` is then attached to the upper end of the barrel 10 to lower it into the well to the depth desired. If the standing valve has not already been inserted, it is placed in the usual manner, as by means of a rod inserted through the tubing, into the cylinder and its extension. When it arrives at the expansible seat 24 as it is being lowered the conical advance. end thereof spreads the segments of said seat, thus permitting the valve to pass and to be insert-ed into place. The interior mechanism, comprising a plunger barrel, the stationary piston therein, the. stationary piston-holder, the piston 11, and its slotted tube connecting' the piston l1 and plunger barrel, are then inserted in place by means of the usual pump rod. As this mechanism enters the upper end of the coupling 17 the lower tapered closed end of the plunger barrel 34 opens the. expansihle seat .24 which permits the plunger barrel to pass through the. device. Thereafter the segments of the seat- Close around said plunger-barrel as it moves'downwardlv therethrough and around the descending slotted tnhe 33, until said parts are arrested h v enga-gement oll the oxpansihlo seat with the lower end of said stationary piston holder. When the stntionarv pistonholder enters the luul'vl or cylinder lll, tho rloso lit. of the pinching 3l) therein requires loro@ to press the holder through snid cylinder. 'llul holder thus remuins stnliouury until the descending piston ll slrilros the suino. 'llurrnl'tvr ilu* weight ol' the pumpiup` rnd nhm'o forros ilul pislou holder through the barrel l() und the roinuotion IT until Ihr Huid stnlionnry pistou-holder ruste-l on liu` sont Ll-l. B v reason ol' lhe sonoro or nhrunl lower enr' oll the piston-holder. snid Htnl is nul exnuuded lull urlesls said holder und supports il in this position. During` llul passage ol' the holder through Ihe ronnrrl ion. the lurking-puni 45 hns heen pressed inwardly, but when said holder reaches they lift the column of liquid above the same and seat the pawl springs outwardly under the 1 discharge the liquid therefrom in accordance shoulder 46 in the connection, whereby said i piston holder is held, not only from descent but from rising. The pump-rod is then connected with the pump actuating mechanism above and the pump is ready for action. The piston 11, when thus inserted in the barrel, is at the downward limit of its down-stroke, and when the pump is started, the said piston and the plunger barrel 34 are raised upwardly to the upward limit of their stroke. The stationary piston 35 remains stationary in the plunger barrel 34 and on the first upstroke of the plunger barrel, fluid or air contained in the lowerend of the plunger barrel passes upwardly and outwardly through the hollow stationary piston and its rod to and through the port 22 of the connection 17. During such up-stroke of the piston the lowering of the pressure in the cylinder and its extension permits the standing-valve to open and liquid enters the said cylinder and extension. On the succeeding down-stroke of the parts the liquid between the pistonholder 38 and the piston 11 passes, in the ordinary manner, through the valved piston 11 to the upper side of said piston. At the same time the fluid in the extension cylinder 16 is displaced by the descent of the plunger barrel 34 and, inasmuch as no other avenue of escape for said fluid is provided, said fluid passes upwardly through the by-passes 20, through the slotted piston-rod 33, and the valved piston 11, to the upper side of the latter piston and the effect of such downstroke is to produce an upward ilow of the liquid and its discharge from the pump outlet equal to the quantity of liquid displaced by the descent of the plunger barrel. During such down-stroke of the plunger-barrel, the interior of the plunger barrel below the stationary piston fills with air or with fluid through the ports 22 and 42 and the hollow piston-rod 36, thereby avoiding the formation of a vacuum in said plunger barrel below said stationary piston. If the cylinder and its extension be submerged in the liquid up to the level of the port 22, said plunger barrel will be filled with liquid; otherwise it will be filled with air. In cases where no provision be made for the admission of air or liquid to the plunger barrel below the stationary piston 35 on the down stroke of the movable piston, the vacuum produced between the piston 35 and the lower end of the plunger barrel 34 may be overcome by adding weight to the pump rod or by the exertion of additional power on the down stroke of the piston.

It will thus be observed that during the down-stroke of the piston 11, liquid is transferred from the lower to the upper side of said piston in the usual manner of a single acting lift-pump and that during the succeeding up-strolre thereof, said piston operates to with the displacement represented by the travel of the piston. In addition to this usual action of the piston 11 an auxiliary flow of liquid is produced during the downstroke of the pump corresponding to the displacement effected by the descending plunger barrel 34, such auxiliary flow passing upwardly through the by-passes 20, and through the valved piston 11 to the outlet or spout of the pump, The passages through the piston 11 and the standing-valve at the lower end of the cylinder extension are made larger than valves of ordinary lift-pumps to accommodate the increase flow of liquid.

The interior mechanism of the pump arranged as described may be completely withdrawn from the upper end of the pump cylinder and extension without the necessity of withdrawing or disturbing the cylinder and the tubing above the same, the said cylinder being open at its upper end and made of a diameter to permit the withdrawal of the pump mechanism. Such withdrawal of the parts is effected by upward pull on the pump rod 12, the parts attached thereto necessarily following. As the mechanism is raised, the holder 38 remains stationary until the lower wall of the slot at the lower end of the tube 33 strikes the locking pawl 45. Thereupon Athe inclined lower face of said pawl engages said lower slot wall and it is caused to swing inwardly past the shoulder 46 of the holder, to disengage the same, whereupon the parts of the mechanism are free to be lifted from the cylinder as will be obvious. The arrangement whereby said parts may be lifted from the cylinder without removing the latter is of considerable importance, inasmuch as it greatly decreases the work required to repair or replace said parts of the mechanism or to repair or replacethe standing-valve at the lower end of the cylinder extension.

The barrel of the pump, while shown as 'made of two parts connected by the coupling 17 may, in some instances, be structurally regarded as a single piston barrel having means for fastening therein the stationary piston-holder in such manner that the pumping mechanism, including the stationary piston, may be removed from the cylinder. I do not wish to be limited to this, or other structural details except as hereinafter made the subject of specific claims.

I claim as my invention 1. In a pump, the combination with the pump barrel provided with a valve at its lower end, of a valved piston reciprocating in the upper end of the barrel, a plunger barrel reciprocating in the lower end thereof and connected to and movable with the piston, a stationary piston in said plunger barrel, and means for removably locking said stationary piston in place.

2.4 In a pump, the combination with the pump barrel provided with a valve at its lower end, of a valved piston reciprocating` in the upper end of the barrel, a plunger barrel reciprocating in the lower end thereof and connected to and movable with the piston, and a stationary piston removably fixed in said plunger barrel, said barrel being constructed to permit withdrawal of the pump.- ing mechanism upwardly through the Lipper end thereof.

In a pump, the combination with the pump barrel provided at its lower end with a valve,'oi a valved piston reciprocating in the upper end of the barrel, a plunger barrel reciprocatingin the lower end thereof, a stationary piston within said plunger barrel, a rod connecting the reciprocating piston with said plunger barrel, and a holder within the pump barrel carrying said stationary piston through which holder saidrod reciprocates.

4. In a pump, the combinationwith the pump barrel provided at its lower end witha valve, of a valvedy piston reciprocating in the upper end of the barrel, a plunger barrel reciprocating in the lower end thereof, a stationary piston within said plunger barrel, a holder within the pump barrel which carries the stationary piston, means for releasably locking said piston holder within the barrel,

and a rod connecting said reciprocating piston with the plunger barrel and sliding through said holder, the cylinder being constructed -to permit the pumping mechanism to be withdrawn upwardly through the upper end thereof.

5. In a pump, the combination with the pump barrel provided at itslower end with a valve, of a valved piston reciprocating in the upper-end of said barrel, a plunger barrel reciprocating in the lower end thereof, a rod connecting the reciprocating piston with said plunger barrel, a'stationary piston in the plunger barrel, and a holder carrying said stationary piston, through which said rod slides, saidI piston holder dividing the pump barrel into upper and lower parts, and a bypass connecting said parts around the piston holder.`

6. A pump comprising a barrel made ofv an upper cylinder and a lower cylinder eXtension connected by a hollow coupling, a valve at the lower end of said cylinder extension a reciprocating valved piston in the cylinder, a plunger barrel reciprocating in said extension, a stationary piston in said plunger barrel, a holder releasably locked in said coupling and carrying said stationary piston, and a tube attached rigidly at its ends to said 'reciprocating piston and plunger barrel and sliding through said piston holder.

4 7. A pump comprising a barrel made of an upper cylinder and a lower cylinder eXtension connected by a hollow coupling, a valve at the lower end of said cylinder extension a reciprocating valved piston in the cylinder, a plunger barrel reciprocating in said extension, a stationary piston in said plunger barrel, a holder releasably locked in said coupling and carrying said stationary piston, a tube or rod attached rigidly at its ends to said reciprocating piston and plunger barrel and sliding through said piston holder, fand a by-pass in said'coupling or connection connecting the cylinder with the cylinder eX- tension.

8. A pump comprising a barrel composed of an upper cylinder anda cylinder eXtension connected `by a hollow coupling, a valve at the lower end of said cylinder extension a valved piston reciprocating in the cylinder, a reciprocating plunger barrel in the cylinder extension, a stationary piston in said plunger barrel, a piston holder in said coupling carrying said stationary piston, a tube or rod extending between and rigidly connectying the said reciprocating piston and plunger barrel, and sliding through said piston holder, anlexpansible seat in the coupling tension connectedy by a hollow coupling, a lvalve at the lower end of said cylinder eX- tensiona valved pistonreciprocating in said upper cylinder, a plunger barrel reciprocating in the cylinder extension, a tubular stationary piston in said plunger barrel provided'4 with a hollow rod, a holder releasably locked in saidvcoupling to which said rod is iiXed, and a rod or tube connecting said reciprocating piston and plunger barrel and sliding in said holder, said holder and the coupling being provided with registering ports which communicate with the hollow rod of the stationary piston andl through the hollow piston to the interior of the plunger below said piston.

10. A'pump comprising abarrel composed of an upper cylinder and a lower cylinder eX- tension connected by a hollow coupling, a valve'` at the lower end of said cylinder eX- tension a valved piston reciprocating in said upper cylinder, a plunger barrel reciprocating in the cylinder extension, a slottedtube connecting said .piston and plunger barrel, a stationarypiston in said plunger barrel, a holder in the coupling to which the rod of the stationary piston is iiXed and through which the hollow'slotted tube slides, an eXpansible seat in the coupling on `which the holder rests, and a spring pawl carried by the holder and projecting through the slot of said tube for engagement with a downwardly facing shoulder in said holder.

1l. In a pump, the combination with the pump barrel provided with a valve at its lower end, of a valved piston reciprocating in ump, the combination with a plunger barrel,

provided with a valve at its j l ton, a stationary piston in said lungen' bnrrel, and means for removably oekmg said stationary pist-on in place, said pump barrel boing open nt its upper end and of u linmei ter to permit the piston and plunger barrel to be removed upwardly from the barrel. i In testimony, that I claim the foregoing as my invent-inn l nflx my signature in the 5 presence of two witnesses, this 3 day of December A. D. 1906 i SIDNEY R. BLANCHARD.

Witnesses:

'* A. C. MANTELL,

l M'. oBmEN. 

